Motorcycle Four Cycle Gasoline Engine Oil
Amendment and addition to the Application Manual



Announcement on the revision of a part about " MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE OILS(JASO T 903:2016) Application manual"(2019.04)

We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual.

The test number of the test method(ASTM) was changed as follows.
-Elemental analysis:-
(Ca-P):
 ASTM D 5185 → ASTM 4951 or D5185
(Sulfur):
 ASTM D 2622 or D 5185 → ASTM D 2622 or D4951 or D 5185
(Mo):
 ASTM D 4951 → ASTM 4951 or D5185

Concerning details, please confirm a revision manual(4T_EV1904.pdf).



Announcement on the revision of a part about " MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE OILS(JASO T 903:2016) Application manual"(2018.12)

We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual.

The points of the revision are as follows.
(1) Taking over of the company code by a merger or brand succession will be accepted.(This 2016 edition's rule shall be applied to the 2011 edition's on-filed oils, too.)
(2) The test number of the test method(ASTM and JIS) was adjusted with the newest standard.
Density (15℃):
 JIS K 2249 → JIS K 2249-1 or JIS K 2249-2
Flash point:
 JIS K 2265 → JIS K 2265-4
 ASTM D 92 or D93 → ASTM D 92
Elemental analysis:
(Ca-P):
 ASTM D 4951 → ASTM D 5185
(Sulfur):
 JIS K 2541 → JPI-5S-38 or JIS K 2541-7
 ASTM D 2622 → ASTM D 2622 or ASTM D 5185

Concerning details, please confirm a revision manual(4T_EV1812.pdf).




Announcement on the revision of the "MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE OILS(JASO T 903)IMPLEMENTATION MANUAL"(2016. 5)

We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual according to the revision of " MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE Oil Standard (JASO T 903:2016)".

The significant changes in Standard and Application manual of the latest revision include:
(1) The changes of engine oil performance classification criteria
It was pointed out that, in some cases, the evaluation results of friction characteristics differed before and after the 2011 revision. Thus the test conditions for the friction characteristic test were reviewed and changed.
(2) The addition of the reporting of molybdenum content in elemental analysis
In the reporting of elemental analysis, molybdenum content was not indispensable until now.
As the new item, a reporting of molybdenum content will be required.
(3) The addition and revision of the effective period for standard conformity oil(This revised points is shown by the red.)
Year of Issuance of the Standard First date when Classification Indication is allowed Last date when new filing is accepted Last date when on-filing is maintained
2006 May 1, 2006 September 30, 2011 September 30, 2016
2011 October 1, 2011 September 30, 2016 April 30, 2021
2016 October 1, 2016    
(4) The revision of performance display format
(This revised part is shown by the red.)
old manual revision manual
In case of on-file as MA or MB
(X = A or B)
In case of on-file as MA1 or MA2
(Y = 1 or 2)
Concerning details, please confirm a revision manual(4T_EV1605.pdf).
* Official commencement of the performance display will be start on October 1, 2016.




Announcement on the revision of the "MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE OILS(JASO T 903)IMPLEMENTATION MANUAL"(2011. 5)

We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual according to the revision of " MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE Oil Standard (JASO T 903:2011)".

The significant changes in Standard and Application manual of the latest revision include:
(1) The changes of engine oil performance classification criteria
Based on changes made to the engine oil performance classification criteria for friction indices resulting from the replacement of reference oils and test materials for friction and steel plates, the JASO Motorcycle Four-Cycle Oil Standard was updated.
For simplicity, JASO T 904 was merged into JASO T 903:2011 as Annex A.
(2) The change of Engine oil quality
About ACEA and API standards, the specifications were changed to reflect the latest revision.
Also, the API-SM/EC, API-SN/RC , ILSAC-GF4, and ILSAC-GF-5 were excluded.
(3) The adoption of the effective period for standard conformity oil
Year of Issuance of the Standard First date when Classification Indication is allowed Last date when new filing is accepted Last date when on-filing is maintained
1998 April 1, 1999 April 30, 2006 April 30, 2011
2006 May 1, 2006 September 30, 2011 April 30, 2016
2011 October 1, 2011    
(4) The revision of performance display format
(This revised part is shown by the red.)
old manual revision manual
In case of on-file as MA or MB
(X = A or B)
In case of on-file as MA1 or MA2
(Y = 1 or 2)
Concerning details, please confirm a revision manual(4T_EV1105.pdf).
And old manual is (4T_EV0604.pdf).

* Data submission will be accepted starting May 10, 2011.
* Official commencement of the performance display will be start on October 1, 2011.




About the typographical error in the line mentioned under the "Designation Mark"(2006. 06)

The "MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE OILS(JASO T 903 : 2006) IMPLEMENTATION MANUAL" was corrected in connection with the typographical error of the line mentioned under the "Designation Mark."

False : Performance is guaranteeing by xxxxxxx Co.,Ltd.
True : Performance is guaranteed by xxxxxxx Co.,Ltd.


Announcement on the revision of the "MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE OILS(JASO T 903)IMPLEMENTATION MANUAL"(2006. 4)

We would like to inform you that the JASO engine oil standard implementation panel revised the on-file standard implementation manual according to the revision of " MOTORCYCLES-FOUR-STROKE CYCLE GASOLINE ENGINE Oil Standard (JASO T 903:2006)".

The significant changes in Standard and Application manual of the latest revision include:
(1) Subdivision of the engine performance classification MA.
 MA → "MA2 and MA1" 
(2) The set of "Phosphorus content"
Phosphorus content : ≥0.08 and ≤0.12 
(3) The change of Engine oil quality 
The oil quality requirements for API categories are revised to "SG, SH, SJ, SL, SM" or equivalent, eliminating SE and SF.
(4) The adoption of the effective period for standard conformity oil 
Year of Issuance of the Standard First date when Classification Indication is allowed Last date when new filing is accepted Last date when on-filing is maintained
1998 1999 July 1 2006 April 30 2011 April 30
2006 2006 May 1    

(5) The revision of performance display format
(This revised part is shown by the red.)
old manual revision manual
In case of on-file as MA or MB
(X = A or B)
Last date when new filing is accepted :
April 30, 2006
In case of on-file as MA1 or MA2
(Y = 1 or 2)
Reference: About the English edition, the text which is related to the engine performance guarantee in lower part was simplified.(It is only JASO T 903:2006)

Concerning details, please confirm a revision manual(4T_EV0604.pdf).
And old manual is (4T_EV0412.pdf).

* Data submission will be accepted starting April 10, 2006.
* Official commencement of the performance display will be start on May 1, 2006.




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